Board of Governors of the Federal Reserve System (U.S.), 1935-. "Industry Groupings, Not Seasonally Adjusted," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "March 16, 1964," G.12.3 Industrial Production (1964-03-16) : 5-5. https://fraser.stlouisfed.org/title/55/item/59518/toc/486155 , accessed on March 29, 2024.